In Aztec mythology, the Ciuteoteo were underworld spirits who were brought from the sun, in the shape of eagles, to Earth, causing sickness in children. They were ruled by Ciucoatl.
Alternative: Ciuateoteo
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... terms of the coefficients a, b and c, which are assumed to be real (but see below for generalizations) with a being non-zero. These solutions are also called the roots ...